Diamagnetic effect and anomalous transport in expanding plasma clouds

Details Diamagnetic effect and anomalous transport in expanding plasma clouds Diamagnetic effect and anomalous transport in expanding plasma clouds

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984stin...8711647d&link_type=abstract

Active Magnetic Particle Tracer Explorers Reports Max-Planck-Inst. für Physik und Astrophysik, Garching (Germany, F.R.). Inst. f

Computer Science

Sound

Diamagnetism, Magnetohydrodynamic Flow, Plasma Clouds, Space Plasmas, Barium Ion Clouds, Electric Current, Hall Effect, Magnetohydrodynamic Stability, Magnetohydrodynamic Waves

Scientific paper

Kinetic and instability effects for the diamagnetic phase of magnetospheric barium releases are explored. By anomalous transport, chiefly from ion sound turbulence, electrons are considered as a fluid while Ba ions are treated as particles. This model is compared to predictions of ideal and resistive MHD. Electron dynamics modifies radial profiles, and allows for effects such as the generation of azimuthal magnetic fields and associated poloidal (Hall) currents near the ends of the elongated plasma cloud, by the combined action of radial and axial expansion. Propagation of shear Alfven waves in flux tubes of the ambient plasma may be initiated. Ion distributions should exhibit axially accelerating ion fronts, radial deceleration and reflection, azimuthal differential spinup, and large pressure anisotropies. The diffuse plasma halo and contamination by the ambient plasma is important for instabilities. The ionization process is expected to have a considerable effect in the diamagnetic phase.

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